Grundfos 98126804 MAGNA3 40-120 F Cast Iron Circulator Pump 115V 3/4 HP

Grundfos pump — Grundfos 98126804 MAGNA3 40-120 F Cast Iron Circulator Pump 115V 3/4 HP

The Grundfos pump (manufacturer part 98126804) is a genuine OEM pump available at Cedars HVAC, your trusted source for heating, cooling, and refrigeration parts. We stock this pump for fast nationwide shipping from our Miami warehouse, so contractors, facility managers, and homeowners can get the exact replacement they need without delay.

Product details

The Grundfos MAGNA3 circulator pumps are designed for circulating liquids in the following systems:

• heating systems
• air-conditioning and cooling systems
• domestic hot-water systems.
• ground source heat pump systems
• solar-heating systems.

The MAGNA3 circulator pumps are designed for circulating liquids in heating systems with variable flows where you want to optimise the setting of the pump duty point, thus reducing energy costs. The pumps are also suitable for domestic hot-water systems. Observe local legislation regarding pump house material. Grundfos strongly recommend that you use stainless-steel pumps in domestic hot-water applications to avoid corrosion.

To ensure correct operation, it is important that the sizing range of the system falls within the duty range of the pump.

The pump is especially suitable for installation in existing systems where the differential pressure across the pump is too high in periods with reduced flow demand. The pump is also suitable for new systems where automatic adjustment of the head to the actual flow demand is required, without using expensive bypass valves or similar components.

Furthermore, the pump is suitable for systems with hot-water priority as an external signal can immediately force the pump to operate according to the maximum curve, for example in solar-heating systems.

View Technical Specifications

Why buy from Cedars HVAC

• Genuine OEM Grundfos parts — not aftermarket substitutes
• Contractor-friendly pricing on every pump
• Fast nationwide shipping from Miami, FL
• Real HVAC expertise — call us at (305) 850-6693 if you need help confirming compatibility
• Financing available at checkout

About this part

This Grundfos pump is part of our Pumps catalog. If you are sourcing pumps for a fleet of equipment or a commercial install, contact us for volume pricing. For installation guidance, always refer to the manufacturer documentation and consult a licensed HVAC technician where required.

Shipping and returns

Most Grundfos pump orders ship the same or next business day from Cedars HVAC in Miami, Florida. Standard ground shipping covers the continental United States, and expedited options are available at checkout. Returns are accepted within 30 days on unopened, uninstalled parts — see our return policy for full details. International shipping is available on request; contact our team for a quote.

Frequently asked questions

Is this an OEM Grundfos part? Yes, the Grundfos pump we sell is a genuine Grundfos pump sourced through authorized channels. We do not substitute aftermarket parts unless specifically marked.

Will this pump fit my equipment? Compatibility depends on the model and revision of your existing equipment. If you need help confirming fitment for the Grundfos pump, call us at (305) 850-6693 with your unit model number and we will confirm before you order.

Can I get a contractor or wholesale discount? Yes. Cedars HVAC offers volume pricing for licensed HVAC contractors, property managers, and resellers. Request contractor pricing or call us to set up an account.

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